How to Play Go Introduction to Go (Weiqi).
How to Play Weiqi Rules of the game of Weiqi.
Yahoo!Games Online game room. Play against others.
Sina Go The site is in Chinese. It has tutorial, online game room, and archives of Weiqi (Go).
Weiqi If you would like to learn more about Weiqi, this site has many useful links.
Weiqi More or less an official site of Weiqi in China.